Dial-lock



R. c. LEWIS.

DIAL LOCK.

' APPucATloN man Ama. 192x.

1,395,845. l Patented N0v.'1,1921.

milllluw mum is a view in UNiTD STAT ROLLIN c. LEWIS, 0F sTAivrroRD,ooivivnorionr, Assieivonfro THE YALE & TOWN MANUFACTURING- COMPANY, OFSTANFORD, CONNECTICUT.

DIAL-LOCK.

Application-filed april 5,

To all whom t may concern: i

Be it known that I, RoLLiN C, LEWIS, a citizen of the United States,and'a resident of Stamford, in the county of Fairfield `and State ofConnecticut, have invented certain new and useful Improvements in Dial-Locks and I do hereby declare the following to be a full, clear, VandeXact description of the' invention, such [as will enable others skilledin the art to which it appertains to make and use the same. n

This invention relates to an improvement in dial locks. v Locks of thistype are sometimes' attacked by-first removing the dial and driving thespindle back into the lock case. `The inner end of the spindlecontacting kwithv thecurb, or the driving cam on the spindle contactingwith the Vfirst tumbler of the series, which tumblers are carried by thecurb, dislodges the curb and its associateddtumblers and also thedriving-cam on the spindle thus removing the bolt locking means andpermitting the bolt to be retracted vfrom the outside.V n p l The objectof this invention is to provide means for normally deadlocking the bolt,and a safety device which moves into position upon the displacement ofthe driving cam, for holding the deadlocking means in its deadlockingposition and thus prevent the retraction of the bolt.V

With this object in view my invention conn l Y i and adapted to beforced out by a spring 22 sists in the parts and combination of parts aswill be more fully explained `and pointed4 out in the claims.

In the accompanying drawings, Figure 1 perspective of the dial, lockcase, spindle, driving cam on the spindle and the combined fence anddeadlocking lever; Fig. 2 is a view of the curb and the well knownmanner.

disk tumblers carried thereby; Fig. 3 is a view in section of Fig. 4 andFig. 4 is an end view of the lock case, the curb, tumblers, driving camand spindle beingl removed.

10 represents the dial and 11r the spindle which connects the dial withthe driving cam 12 which as shown in Fig. 1 is keyed to the spindle 11and turns therewith. Thisdriving cam 12 is located within thelock ase13, and actuates the tumblers 14 in the AThese tumblers are assembledand secured on a sleeve 15 intef gral with the curb 16, and the latteris secured to the open end of the lock case with Specification ofLetters Patent.

` up and in position to r thus yreleasing the bolt ratentearaov. i,i921. 1921. Serial No. 458,690.

the first tumbler thereon in position to be engaged and actuated by thedriving cam.

As the lock case 13 is secured to theinner face of the door, and thetumblers assembled on and secured to the curb which is secured to thelock case, it follows that if the curb be forcibly detached fromV thelock case, by driving the spindleV inwardly, thetumblers will also bedislodged and fall out with the curb. y

The tumblers and driving cam are veach provided with a slot or gating19, and the fence 17 which is integral' with the dog or dead lockinglever 18 normally rests against the peripheries of the tumblers and.driving cam and holds ythe freeend of the dog 18 dog or deadlock thebolt. Vhen the tumblers are turned by the dial spindle and driving camto bring the gatings into alinement, the fence enters the latter thuspermitting the free end of they lock case vat 20,'

the bolt and permitpthe action in the event the tumblers and driving.cam are-displaced, `andprevent the dog orv i dead locking lever 18 fromdropping and and it consists of a plate 21lof a size and the lock casein frontk ofthe driving cam,

of the fence 17 the displacement ofthe and obstruct the movementV in theevent of driving cam.

This plate is provided at its upper end with a projection 23 which restsin a slot in the lock case and prevents displacement of the plate, andis also provided centrally with an opening 24 for the passageof thespindle 11. The spring 22 rests Vbetween the front face of the lock caseand the plate 21 and tends to force the lower end of latter outwardly asshown in Fig. 8, but is normally held in the position shown in dottedlines by the driving cam 12 which when in normal position holds theplate against the front face of the lock case. If however the drivingcam be forced rearwardly or inwardly by force applied to the spindle,the plate 21 will. be forced inwardly by its spring 22 as the cam 12 ismoved rearwardly, and engages the fence and prevents the latshape to fitwithin tion over the fence and absolutely prevent the latter from risingas it must do to re`` lease the bolt.

In the ordinary operation of the lock, the plate 21 is held out of thepath of the tence and it is only when the driving cam has been displacedthat this plate moves to a vposition to engage and obstruct the movementof the fence and conseounantlyy the dogging lever 18 integral with thefence.

" It is evident that numerouschanges in the details of construction maybe resorted to without departing from the spirit of my invention hence Iwould have itunderstood that I do not confine myself to details eX- ceptsuch as may be referredV to in the claims.

I-Iaving fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

V1. InV a lock, the combination of a spindle, a tumbler actuated by thesame, a fence cooperating with the tumbler t0 dog and tov release thebolt and means normally held out of the path of movement of the fence,but adapted to be positively moved into position t0 obstruct theunlocking movement of the fence if the tumbler be moved from its normalposition Vwith relation to the tence.

2. In a locl'z, the combination of a spindle, a driving cam thereon, atumbler actuated Vby the driving cam, a fence cooperating with Y thetumbler to dog and to release the bolt,

and means normally heldV out of the path oi movement ofthe fence by thedriving cam and adapted to move rearwardly or Vinwardly to a positionover the 'fence in the event the driving cam be forced rearwardly.

3. In a lock, the combination of a spindle,

la driving cam thereon, a tumbler actuated by the driving cam, a fencecooperating with the tumbler to dog and release the'rbolt,

safety device normally held out of the path of movement of the fence bythe cam and a spring for moving the safety device-into the ath ofmovement-of the tence in the eventv lof the displacement of the cam. Y'

11. vIn a lock, the combination of'a tence for dogging with the v:tenceto permit the latter to move to release the bolt,.and a safety devicenormally held in inoperative position by said cooperating means, butadapted, in the event of the displacement o-kthe latter, Vto move intothe path of movement of the enceand hold the same in its lockingposition. 'l'

5. Ina lock, the combinationl of a loclr',k

case, a spindle, a dialk and driving cam on the spindle, the driving cambeing located withinthe lock case, tumblersV actuated by the cam, afence and aspring pressed safety plate located inV front or1V the camand northe bolt, means cooperating I mally held in inoperative' positionby the latter but adapted to be moved into the path ofmovementfof thetence inthe event the cam be displaced rearwardly or inwardly.v

Z 6. In a lock, the combination of a' lock... case, a spindle", a dialand driving cam on the spindle, the driving cam being located withinthelock case, tumblers also locatedwith- Y inthe vlock case and actuatedthe driving cam, a fence cooperating with'the tumblers,

and a spring pressed safety plate located in I 'rontof the cam andprovided Ywith a pro-- jection restingwithina slot inthe case, the

said plate being 4normally held in inoperative position bythe cam butadaptedto be moved by its spring into the pathofmove-r ment of theVtence in the event thekcam be displaced''inwardly'.l Y L y In'testimonywhereof, I have signed this speciiication inthe presence of twosubscribing witnesses., f c Y Y y QROLIJIN C. LEWIS-. C VVitnesses:. Y"

'CHARLES'- BERRY, y ICATHERInE'W. GRAVES. l

